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Finding the Fourth Proportional to 10,888.80, 15,005.04 and 7,736.16

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Solution

The fourth proportional to 10,888.80, 15,005.04 and 7,736.16 is: 10,660.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,888.80 : 15,005.04 = 7,736.16 : x
  2. Step 2: Convert to fraction form
    10,888.80/15,005.04 = 7,736.16/x
  3. Step 3: Cross multiply
    10,888.80x = 15,005.04 × 7,736.16
  4. Step 4: Simplify right side
    10,888.80x = 116,081,390.25
  5. Step 5: Solve for x
    x = 116,081,390.25/10,888.80
  6. Step 6: Final answer
    x = 10,660.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.